World War Hulk: X-Men is a three-issue miniseries published by Marvel Comics. It is connected to the World War Hulk story arc and focuses on Professor Xavier's involvement in the Illuminati (a secret group consisting of prominent superheroes) and the Hulk's expulsion into space. In the storyline, Xavier was not present when the decision to send the Hulk away was made by the Illuminati. As a result, the Hulk visits the X-Mansion to seek Xavier's perspective on what he would have chosen if he had been there. This part of the World War Hulk storyline occurs before, during, and after Endangered Species. The storyline explores themes of power, responsibility, and the consequences of past actions. Source: Wikipedia (en)